From Kagami:
With their father going away for an extended time without any warnings whatsoever, the Yamadas have to get by on their own, and Tarou, the eldest son, carries the biggest burden of all: supporting their large family, even with his mom's RECKLESS spending.
Of course, Tarou's money problem is overshadowed by his appearance, as many girls (and GUYS) trample all over each other to get his attention. Experience the joys and tears of being poor AND beautiful while reading this manga, but ESPECIALLY ENJOY THE LAUGHS! ^_^